I wanted to share what I think is a good idea, I haven't seen it before, but apologize if it is already covered.
I've been doing different electronic DIY projects for around ten years, and one thing I always hated was dealing with Molex connectors. When I need three wire connectors, I would often scavange the audio connectors used to run audio from the CDROM drive to a motherboard. The other day I ran across these at RadioShack:
http://www.radioshack.com/product/index.jsp?productId=12825863In addition to using them for their intended use (prototyping Arduino circuits), I have started to use these for quick disconnects on arcades. I recently sold an arcade I made for my workplace, and I had never gotten around to remote wiring the powerbutton, but I wanted to do that before selling it. Instead of using spade type disconnects (ugly in my opinion), I opted to cut two of these jumpers in half and solder the female end to the case powerbutton and then the male end to a wire that leads to the remote button. I then drilled a small hole in the front of the case and fed the female jumpers through. This way, I can quickly disconnect the power button from the case in order to install the button or disassemble the case for transport, but I can quickly reconnect whenever I want. They have a secure connection. I probably wouldn't use this idea for more than 4 or 5 wires in a ribbon cable, but it works great for just a few. It is also easy to use heatshrink to completely insulate the connections.